Animals that feed on both plant and animal tissues are referred to as
A) herbivores.
B) carnivores.
C) omnivores.
D) detritivores.
C
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Why do chemical reactions tend to speed up when the concentration of the reactants is increased?
A) The reactants move faster. B) The reactants collide more often. C) The reactants have greater energy. D) All of the listed responses are correct.
Martin Pollak studies kidney disease in humans. Why does he use human subjects in his research, instead of animal
models?
a. He can perform invasive experiments on humans. b. He can carry out planned matings in humans. c. Humans have a long generation time. d. He can examine renal phenotypes in conjunction with genetic analyses. e. He can genetically manipulate his patients.
A learned behavior cannot be changed
Indicate whether the statement is true or false
The greenhouse effect is
A) of little concern, since it is part of the normal cycle for the planet. B) reduced by photosynthesis, which removes carbon dioxide from the atmosphere. C) reduced by the addition of carbon dioxide to the atmosphere, since carbon dioxide removes excess heat from the Earth's surface and reflects it back into space. D) made worse by photosynthesis, which adds carbon dioxide to the atmosphere. E) reduced by the burning of fossil fuels, which removes oxygen from the atmosphere.